Can only give you some feedback on Lot's european C class.
Flew WAS-FRA and POZ-MUC.
On the WAS-FRA 737 aircraft there was no free middle seat (i.e. 3 x 3 seating in C!!).
Service on the short flights was reasonable..a cold meal and drinks were served. Did not see what catering was provided in Y class.
The lounge in WAS was extremely crowded (Friday pm) but had a large selection of drinks and some snacks. Also free wireless access I think.
The longhaul LOT C product actually looks quite nice and IIRC is quite new. For a transatlantic flight this certainly would be something I would consider if the price was less than other *A carriers.
Hope this helps a little!
fm747